I tell you the ones you need to bother with at the moment.
To get member level 1 you need to get 25 posts, this will also allow you to have a signature and post links.
To get member level 2 you need to get 2500 posts, you get an increase in avatar size.
To get member level 3 you need to get 5000 posts, increase in avatar size.
To get member level 4 you need to get 10000 posts, increase avatar size.
There was a list made recently, http://www.mpgh.net/forum/2-general/...ml#post8270793